<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>注册界面</title>
</head>
<body>
    <div class="page-container">
    <div class="form-container">
    <form action="#" method="get">
    <div class="form-group">
    <label for="phone">手机号码</label>
    <input autocomplete="off"
    autofocus
    required
    name="phone" id="phone"
    placeholder="请输入手机号"
    pattern="^1[3-9]\d{9}$"
    title="请输入有效的手机号(11位数字,以13/14/15/17/18/19开头)"
    type="tel">
    </div>
    <button>注册</button>
    </form>
    </div>
    </div>
    </body>
</html>